....but essentially to start with you paid her a 100 quid less and suggested she had miscounted? Mate, any prossie would give you lip over this.
Agreed that it was bad her to go mental, and that it would be a bad way to start a punt, especially such an expensive one. At the same time, most WGs would get at least a bit mental if they think they were handed less than agreed upon dosh.
Something that can prevent this: I keep the money pre-folded in a solid block, separate from my extras and spending cash. That way I can simply remove the pre-counted money, which I then count in front of them, keeping it fanned out as I hand it to them. It's already pre-counted, but if there was a problem it would be obvious, and I could then use the money for extras or post-punt spending.